Celebrity example in Don't Forget Your Initiative: When I was a freshman, an old professor gave us a test. The old professor asked, "When you go to the mountain to cut down trees, there are two trees in front of you. A thick one and a thin one. Which one will you cut? " When the problem came out, everyone said, "Of course, it should be cut thick." The old professor smiled and said, "The thick one is just an ordinary poplar, and the thin one is Korean pine. Which one will you cut now? " As soon as we thought that Korean pine was more precious, we said, "Of course, Korean pine was cut down, and poplar trees are worthless!" " "The old professor looked at us with a constant smile and asked," If the poplar is straight and the Korean pine is crooked, which one do you cut? "We were a little confused about the philosophy of cutting down trees, so we said," In that case, we'd better cut down poplars. Korean pine is entangled and nothing can be done! " The old professor's eyes flashed, and we guessed that he would add conditions again. Sure enough, he said, "Although the poplar is straight, it is mostly empty in the middle because of its age. Which one will you cut at this time? " Although we didn't understand what medicine the old professor was selling in the gourd, we still started from the conditions he gave and said, "That's still cutting Korean pine, and the middle of poplar is empty, which is even more useless!" The old professor then asked, "but Korean pine is not hollow, but it is too twisted and difficult to cut." Which one would you cut? "We don't even think about what conclusion he wants to draw, so we say," Then cut down the poplar. It's no use, of course it's easy to cut! " The old professor asked again without breathing, "but there is a bird's nest on the poplar, and several birds are hiding in it." Which one would you cut? Finally, someone asked, "Professor, what do you want to tell us?" Test what? "The old professor put away his smile and said," Why doesn't anyone ask himself why he wants to cut down trees? Although my conditions are constantly changing, the final result depends on your initial motivation. If you want firewood, you cut down poplars; If you want to make handicrafts, cut Korean pine. Of course you don't go up the mountain with an axe to cut down trees for no reason! "